At Parsons, you can imagine a career where you thrive, work with exceptional people, and be yourself. Guided by our leadership vision of valuing people, embracing agility, and fostering growth, we cultivate an innovative culture that empowers you to achieve your full potential. Unleash your talent and redefine what’s possible.
Job Description:
Join Our Team: Principal Mechanical Engineer – Water Group
Location: Pasadena, CA (with initial assignment in Orange County, CA)
Are you a seasoned Mechanical Engineer passionate about creating solutions that improve communities? Parsons’ Water Group in Pasadena, CA, is seeking a dynamic Principal Mechanical Engineer to lead and innovate in the design of cutting-edge wastewater treatment facilities. Join an established engineering team that values collaboration, creativity, and technical excellence.
This role offers an exciting opportunity to contribute directly to impactful infrastructure projects while working in Orange County, CA, during the initial assignment phase.
Why Join Parsons?
- Make an Impact: Be at the forefront of designing essential wastewater treatment systems that enhance environmental sustainability and community well-being.
- Grow with Us: Lead a team of skilled engineers and designers, guiding technical excellence and driving professional growth within the team.
- Engage in Innovation: Use the latest tools and technologies to create efficient, state-of-the-art designs.
Your Key Responsibilities
As a Principal Mechanical Engineer, you’ll:
- Design Excellence:
- Develop detailed designs for mechanical piping systems, reclaimed water systems, lift stations, and wastewater treatment facilities.
- Create and review technical specifications, detailed drawings, and scopes of work.
- Perform quality assurance and control (QA/QC) reviews for comprehensive, multi-discipline design projects.
- Project Leadership:
- Lead project teams on medium to large-scale projects, ensuring designs meet client expectations and compliance standards.
- Mentor and guide engineers and designers to achieve technical and professional growth.
- Construction Support:
- Address engineering bid questions, respond to contractor inquiries, and verify equipment compliance with design specifications.
- Support site investigations and develop operation and maintenance (O&M) plans, including on-site training for personnel.
- Technical Expertise:
- Conduct hydraulic calculations, system head curves, and pump and motor sizing.
- Oversee the design of processes such as headworks, aeration basins, disinfection systems, anaerobic digestion, and more.
- Ensure designs align with industry standards, including ASME, ASTM, ANSI, NFPA, and OSHA.
What You’ll Bring to the Team
Required Skills:
- Proven leadership and ability to perform in a lead capacity.
- Expertise in wastewater treatment system design, including piping layouts, chemical storage systems, HVAC, and pumping systems.
- Proficiency in engineering software and tools, including AutoCAD and Revit.
- Strong communication skills, both written and oral.
- Working knowledge of safety standards, including Cal OSHA regulations.
- Bachelor’s degree in Mechanical Engineering.
- Licensed Mechanical Engineer (PE) in the State of California.
- Minimum of 10 years of experience in wastewater treatment or similar industrial facility design.
Desired Skills:
- Familiarity with interdisciplinary design processes.
- Advanced knowledge of mechanical engineering codes and standards.
- Proactive problem-solving skills and a self-starter attitude.
What We Offer
- Competitive salary and benefits package.
- Opportunities to work on meaningful, high-impact projects.
- A supportive and inclusive team environment where innovation thrives.
Take the next step in your career and make a difference with Parsons.
Apply today to become part of a team that’s shaping the future of water infrastructure.
Security Clearance Requirement:
NoneThis position is part of our Critical Infrastructure team.For more than 80 years, our experts have designed and delivered the critical infrastructure that connects and protects communities around the world. We work in collaborative teams, both within the company and with our partners and customers, to plan, design, build, and modernize infrastructure. We take special pride in projects and solutions that improve communities as well as people’s quality of life by promoting economic growth, enhancing mobility, and increasing sustainability and resiliency. Powered by our people, we provide the imagination necessary to support our customers’ visions—and to help them see what's next!Salary Range: $103,500.00 - $181,100.00We value our employees and want our employees to take care of their overall wellbeing, which is why we offer best-in-class benefits such as medical, dental, vision, paid time off, Employee Stock Ownership Plan (ESOP), 401(k), life insurance, flexible work schedules, and holidays to fit your busy lifestyle!Parsons is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, veteran status or any other protected status.We truly invest and care about our employee’s wellbeing and provide endless growth opportunities as the sky is the limit, so aim for the stars! Imagine next and join the Parsons quest—APPLY TODAY!Parsons is aware of fraudulent recruitment practices. To learn more about recruitment fraud and how to report it, please refer to https://www.parsons.com/fraudulent-recruitment/.
Skills Required
- Proven leadership and ability to perform in a lead capacity.
- Expertise in wastewater treatment system design, including piping layouts, chemical storage systems, HVAC, and pumping systems.
- Proficiency in engineering software and tools, including AutoCAD and Revit.
- Strong written and oral communication skills.
- Working knowledge of safety standards, including Cal OSHA regulations.
- Bachelor's degree in Mechanical Engineering.
- Licensed Mechanical Engineer (PE) in the State of California.
- Minimum of 10 years of experience in wastewater treatment or similar industrial facility design.
- Familiarity with interdisciplinary design processes.
- Advanced knowledge of mechanical engineering codes and standards.
- Proactive problem-solving skills and a self-starter attitude.
Parsons Corporation Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Parsons Corporation and has not been reviewed or approved by Parsons Corporation.
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Retirement Support — Retirement programs are framed as a major value driver, with an ESOP alongside a 401(k) match and additional stock-purchase options contributing meaningfully to total rewards. This structure is positioned as especially attractive for employees who value long-term wealth-building over immediate cash.
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Healthcare Strength — Health coverage is described as broad and choice-rich, with multiple plan types (PPO, HDHP, and some HMO networks) plus dental, vision, EAP, and wellness resources. The availability of different plan designs and national-carrier coverage supports varied employee needs.
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Leave & Time Off Breadth — Time-off offerings are portrayed as competitive, including PTO, holidays, flexible schedules such as a 9/80 option for eligible roles, and floating holidays in the U.S. Paid parental leave of 160 hours is also highlighted as a meaningful component of the overall package.
Parsons Corporation Insights
What We Do
Parsons is a digitally enabled solutions provider with a focus on making the world safer, smarter, healthier, more sustainable, and more connected. Founded in 1944, Parsons primarily serves the defense, security, and infrastructure markets. Uniquely qualified to deliver cyber/converged security, technology-based intellectual property, and other innovative services, the corporation delivers state-of-the-art solutions to federal, regional, and local government agencies as well as to private industrial customers worldwide. Parsons has a reputation for inclusion and diversity and has been named to the Ethisphere Institute’s list of World’s Most Ethical Companies for 10 consecutive years. Parsons facilitates a culture of innovation by encouraging collaboration among its employees and providing opportunities for career growth. With offices around the globe, people of varied talents and backgrounds, and a wide range of exciting projects, the possibilities at Parsons are endless. For more about Parsons, visit www.parsons.com. Mission: Delivering innovative infrastructure, defense, and security solutions to enable a more sustainable, safer, smarter, and more connected world.
